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Patents for Hugo Koelker
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	326,561	Sep. 22, 1885	L.N. Hopkins, G.M. Hopkins	Gas Engine
	410,474	Sep. 03, 1889	H.D. Wickes	Saw-mill
	437,360	Sep. 30, 1890	W. Hochhausen	Dynamo-electric machine
	441,962	Dec. 02, 1890	C. Morrill	Saw-Set

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